mc68hc705c4acfn Freescale Semiconductor, Inc, mc68hc705c4acfn Datasheet - Page 89
mc68hc705c4acfn
Manufacturer Part Number
mc68hc705c4acfn
Description
M68hc05 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC705C4ACFN.pdf
(210 pages)
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8.3.2 Output Compare
MC68HC705C4A • MC68HSC705C4A — Rev. 3.0
MOTOROLA
15
15
OUTPUT COMPARE REGISTER HIGH
COUNTER HIGH BYTE
$0016
The output compare function can generate an output signal when the
16-bit counter reaches a selected value. Software writes the selected
value into the output compare registers. On every fourth internal clock
cycle the output compare circuitry compares the value of the counter to
the value written in the output compare registers. When a match occurs,
the timer transfers the programmable output level bit (OLVL) from the
timer control register to the output compare pin (TCMP).
Software can use the output compare register to measure time periods,
to generate timing delays, or to generate a pulse of specific duration or
a pulse train of specific frequency and duty cycle on the TCMP pin.
Figure 8-4
TIMER STATUS REGISTER
Figure 8-4. Output Compare Operation
16-BIT COMPARATOR
$0012
8
shows the logic of the output compare function.
7
Capture/Compare Timer
OUTPUT COMPARE REGISTER LOW
COUNTER LOW BYTE
$0017
0
0
TIMER STATUS REGISTER
$0013
CONTROL
LOGIC
PIN
Capture/Compare Timer
INTERRUPT
REQUEST
TIMER
TCMP
Timer Operation
Technical Data
89
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